Chapter 8 Review

1. structure found outside of the membrane in plant cells that supports & protects the cell
3. _______diffusion; movement of particles across the membrane, from high to low concentration, through protein channels
8. breaks down compounds & gets rid of materials that cell can no longer use
10. gave cells their name
11. organism with cells that contain a nucleus
14. contains the cell's genetic material & controls many of the cell's activities
17. makes proteins
18. organelle that captures sunlight and converts it into chemical energy for plants
20. single-celled organism lacking a nucleus

2. requires energy to move materials across the cell membrane
4. this structure serves as the cell's boundary from its environment
5. regulates what materials can enter and leave the cell
6. area of the cell outside of the nucleus
7. organelle responsible for sorting and packaging proteins
9. group of structures that help the cell maintain shape & move
12. said cells come from pre-existing cells
13. converts the chemical energy stored in food into compounds that the cell can use
15. said all animals have cells
16. movement of particles from high to low concentration
19. a group of similar cells that perform a particular function